Metodologías de fijación de prioridades en la selección de investigaciones / Methodology of priority setting in the investigations selection

La matriz de estrategias combinadas (MEC), instrumento para fijar prioridades en investigación, permite la organización de información procedente de diversas fuentes y la configuración del estado de situación sobre determinada enfermedad desde el punto de vista del individuo, la familia y la comunidad, el ministerio, otras instituciones relacionadas o no con la salud, y de políticas macroeconómicas. Objetivos: Adaptar y validar la MEC como herramienta para establecer prioridades en investigación en salud en Argentina. Metodología: Se analizaron las prioridades de cinco áreas problemáticas: enfermedades transmisibles, factores de riesgo de enfermedades no transmisibles, salud sexual y reproductiva, lesiones y salud del niño y de la niña. Un equipo de trabajo interdisciplinario (ETI) de 19 profesionales fue responsable de la ejecución del protocolo. Expertos en cada tema completaron una encuesta que permitió conocer su perspectiva. Se organizaron 5 talleres abiertos con invitados especiales representantes de distintas dimensiones institucionales. Resultados: Un total de 48 asesores, 81 expertos y 266 participantes de diferentes provincias y de la Ciudad Autónoma de Buenos Aires concurrieron a los talleres donde en pequeños grupos discutieron el proceso de validación de la MEC que sumado a la búsqueda, recuperación y análisis crítico de la información a cargo del ETI permitió construir una matriz para la mayoría de las entidades propuestas inicialmente. Conclusión: El proceso de validación indica que la MEC es una herramienta útil, factible de ser completada, que facilita el diálogo entre diversos actores con diferentes conocimientos, intereses y necesidades en materia de investigación sanitaria.

The Combined Approach Matrix (CAM), a tool to set research priorities, helps to organize the information coming from different sources and present the current knowledge about a certain disease from the point of view of the individual, household and community, the health ministry and other institutions related or not with health, and macroeconomic policies. Objective: adapt and validate the CAM as a tool to set research priorities in health in Argentina. Methodology: the priorities for five health problems were analyzed: communicable diseases, risk factors for non-communicable diseases, sexual and reproductive health, disabilities and children's health. An interdisciplinary working group (IWG) of 19 professionals was responsible for the execution of the protocol. Experts in each topic filled a survey that presents their perspective. Five open workshops were organized with special guests representing the different institutional dimensions. Results: A total of 48 advisors, 81 experts and 266 participants from different provinces and Ciudad Autónoma de Buenos Aires attended the workshops, where in small groups they discussed the validation process of the CAM, that together with the search, retrieval and critical analysis of the information in charge of the IWG allowed the filling of the CAM for the majorities of the health problems initially proposed. Conclusions: the validation process indicates that the CAM is a useful tool, feasible to be completed, which fosters dialogue between the various stakeholders or participants needing health research.

[Decision analysis: diagnostic approach in HIV infection associated chronic diarrhea]. / Análisis de decisión: diagnóstico de diarrea crónica asociada a la infección por HIV.

UNLABELLED: Chronic diarrhea is still a problem of difficult management in patients with AIDS, even in the HAART (Highly Active Antiretroviral Therapy) era. AIM: To establish the most appropriate diagnostic procedure for HIV infected patients, with CD4 count below 200 cells/ml and chronic diarrhea, starting on HAART. METHODS: Using a decision tree as the tool of a decision analysis, two alternatives were considered for the ethiologic diagnosis in AIDS associated chronic diarrhea. The compared alternatives were a minimal evaluation (stool culture and parasite stool examination), and complete evaluation (adding endoscopies with intestinal biopsies). The decision tree was constructed by TreeAge Data 32 software. Diagnostic and therapeutic data for both alternatives were obtained from medical publications. The outcome was the reported survival estimation for HIV infected patients with CD4 level bellow 200 cells/ml, starting HAART, with and without chronic diarrhea. RESULTS: In the basic analysis, as well as in the sensitivity analysis, a complete evaluation was the alternative that showed the highest expected value: 7.79 years of survival. The minimal evaluation showed a value of 7.05 years of survival. CONCLUSION: In HIV infected patients with chronic diarrhea and CD4 count below 200 cells/ml, starting on HAART, digestive endoscopies with biopsy samples are the best diagnostic approach.

[Oesophageal candidiasis: clinical and mycological analysis]. / Candidiasis esofágica: análisis clínico y micológico.

Oesophageal candidiasis is an epithelial infection which requires an immune deficiency. C. albicans is commonly the cause, although other species may also be responsible. Resistance to fluconazole, drug of choice for treatment, is an emerging problem. The objectives of the current paper were: to determine the frequency of oesophageal candidiasis in patients submitted to upper gastrointestinal endoscopy, analyze risk factors, identify Candida species and determine in vitro susceptibility to fluconazole. During 12 months, 34 patients with oesophageal candidiasis were detected. Out of 1.230 HIV negative and 91 HIV positive patients submitted to upper endoscopy, 11 (0.9%) and 23 (25.3%), respectively, had candidiasis. Risk factors for HIV negative patients were systemic antibiotic therapy in 2, deficient dental cleaning in 2 aged patients, use of proton pump inhibitors in 3, inhaled steroids in 2, malignancy in 1 and oral steroids in 1. The histopathologic diagnosis was confirmed in 48.6% of cases. Cultures were positive in 91.2% C. albicans was prevalent (93.5%), and was associated to other species in 5 cases (16.1%), (3 C. glabrata, 1 C. tropicalis and 1 C. parapsilosis). One case cultured only C. glabrata and 1, only C tropicalis. Out of 31 cultures, 25 were susceptible to fluconazole, 4 dose dependent (1 C. albicans, 3 C. glabrata), and 2 resistant (1 C. albicans, 1 C. glabrata). Frequency of oesophageal candidiasis was low, except for HIV positive patients. The most common etiologic agent was C. albicans, though other Candida species were also found. C. albicans and C. glabrata showed dose dependency and resistance to fluconazole.

[Endoscopic approach in HIV infected-patients with upper gastrointestinal symptoms]. / Evaluación endoscópica de pacientes VIH positivos con síntomas digestivos altos.

UNLABELLED: Upper gastrointestinal symptoms such as nausea, vomiting, upper abdominal pain, heartburn, early satiety, bloating and anorexia, are frequently reported by HIV positive patients; however, their prevalence and diagnostic approach are unknown. AIMS: To evaluate the frequency of endoscopic and histologic diagnosis in HIV positive patients with upper gastrointestinal symptoms referred to upper endoscopy, and to compare them with those found in a non-HIV infected group with similar symptoms. PATIENTS AND METHODS: Out of 132 HIV positive patients referred to upper endoscopy, 102 (75%) with upper gastrointestinal symptoms, and 177 non-HIV controls were prospectively included. All patients answered questionnaires assessing frequency, severity and impact of symptoms on quality of life, and underwent upper endoscopy with systematic mucosal biopsies from esophagus, stomach and distal duodenum. RESULTS: Upper abdominal pain, heartburn and bloating were the most common upper gastrointestinal symptom reported in both groups. Anorexia, nausea, vomiting and early satiety were more frequent among HIV positive patients (p = or < 0.01). Intensity and impact of symptoms quality of life were higher in this group (p = 0.0001). Opportunistic infections were detected in 29 (28.4%) HIV positive patients. This subgroup had a lower mean CD4 count (p = 0.0004). In 76 (75.4%) HIV positive non-opportunistic diseases were diagnosed, with similar frequency to HIV negative individuals. CONCLUSIONS: Upper endoscopy with biopsies detected opportunistic and non-opportunistic diseases in HIV positive patients with upper gastrointestinal symptoms. Opportunistic diseases were related to lower CD4 counts. Non-opportunistic diseases had similar frequency in both groups, HIV positive and negative controls.